Naruto headcanons:
(Warning: Sakura-centric. Don't like? Don't read.)
Sakura (slug summonning contract) and Shino (aburame bugs) bonded over their connection to bugs. Also, Shino is into Herbology and is intellectual to a fault. Sakura likes getting into arguments with him.
Lee and Sakura are brotp because they understand more than anyone else that they are unprivileged. Chouji joins their fray when Sakura notices how he is shadowed by his teammates and see herself in him. They call themselves 'Big 3' because they have inhuman strength.
Sakura is the only female of their generation to have six abs and perfectly tight body. Boys envy her body.
Not unlike Konohamaru who follows Naruto, Moegi worships the ground Sakura walks on. She wants to be expert in both killing and healing.
Postwar Sakura takes Anger Management lessons from Hinata.
Ino and Sakura are lowkey gay for each other but neither will admit to that.
Kiba ships it because he doesn't want more violent women offsprings in the world.
Shikamaru ships too, just to get Ino off his back. (ShikaIno was canon at one point...until it wasn't)
The real reason why Shino always covers his body is that he has piercings and tattoos on his body. And Aburame family has ties all across the world. They are the largest community and are often the ones sent on long term undercover missions because of their ties.
Shino makes it to Anbu first much to everyone's shock. Except Hinata. Hinata knew he would.
Tenten joined after him and that was the best decision she ever made.
Neji never died, but he stayed in coma for 7 years. After that, became physically unfit to remain a active shinobi. He left the clan and moved in with Tenten and Lee. He later married Tenten who became the breadwinner of the family.
Hinata became a teacher at the academy. She was consistently voted as the best teacher of the year and the years following. Children love her.
Sakura joined Anbu but she quit to leave village for several years to offer her services to less privileged villages. Naruto remained in contact with her by strategically opting his missions near her location.
Sai joined her full time.
(I refuse to believe Sakura and Sai aren't close like Sasuke and Naruto.)
Sai and Sakura bonded over their role of being replaceable in team 7. Sakura has always felt like she was the least significant member of the team, and Sai was a replacement of the original member, root only adding to his case. Their insecurities and positions deepened their friendship.
Sasuke never came back to the village, nor the village welcomed him, but he stayed in contact with Naruto. And occasionally, Kakashi. Sakura wasn't hurt because she never expected him to reach for her.
(I don't hate SasuSaku but I want Sakura to have some self respect.)
During the war, Shi (C) and Sakura became close friends over their mutual passion for medicine. She is the only leaf he doesn't hate and actually respect.
(C is a jounin from Kumo, one of the bodyguards of Raikage alongside Darui. He knows medical ninjutsu. Since he knew Medical ninjutsu and medics are prized during crisis, he probably was placed in healing.)